HESI Chemistry practice test
The HESI Chemistry practice test comprises 25 inquiries identified with Scientific Notation, the Metric System, and Temperature; the Atom; the Periodic Table; Chemical Equations; Solutions; Chemical Reactions; Oxidation-Reduction Reactions; Acids and Bases; Nuclear Chemistry; and Biochemistry.
Welcome to your free HESI Chemistry practice test.
The accompanying example test incorporates 10 HESI Chemistry practice test questions so you can find out precisely how prepared you are for the science segment of your impending HESI test.
Each question is trailed by the right answer and a point-by-point answer clarification (actually like utilizing the inquiry bank in our HESI Practice Test Pack).
Toward the training test finish, you will be given a score report that separates which sub-subjects you should zero in on to improve rapidly.
Kindly let us know how you did in the remarks, and make sure to impart this post to your companions who may likewise think that it’s supportive.
What is the atomic number of an unknown element with 45 protons and an atomic mass of 64?
Correct answer: 45
The number of protons in an atom's nucleus is also the atom's atomic number. In this example, we are told that there are 45 protons present and that the atomic mass is 64; nevertheless, we do not require the atomic mass when looking for the atomic number. As a result, the atomic number is 45.
What is the usage of scientific notation?
Correct answer: The plan is to make it easier to deal with both tiny and large quantities.
Scientific notation helps us to more easily explain little and large numbers.
In degrees Celsius, a typical human body temperature is
Correct answer: 37 degrees
Because the average human temperature ranges from 36.5 to 37.5 degrees Celsius, 37 degrees is the optimum response.
What is the sodium charge in the compound NaCl?
Correct answer: +1
The chemical interaction between sodium and chlorine is an ionic one, in which sodium transfers an electron to chlorine to form sodium chloride. The donation of one electron results in a charge of +1 for sodium and a charge of 1 for chlorine.
Which of the following causes cramps during strenuous exercise?
Correct answer: Lactate
Lactate, commonly known as lactic acid, is responsible for the burning or cramping sensation experienced after hard activity.
What does -COOH mean?
Correct answer: Carboxyl group
A carbonyl and a hydroxyl group are linked to the same carbon atom in the carboxyl group.
Unstable nuclei, given enough time, will:
Correct answer: decay into a stable form
Unstable nuclei will decay into stable nuclei given enough time.
Citric acid is found in lemon juice. Which of the following pH levels is most likely for lemon juice?
Correct answer: 2
Because lemon juice includes an acid, its pH will most likely be acidic. The only acidic pH among the above possibilities is 2. Citric acid, in reality, has a pH of 2.2.
If a specific reversible process reached equilibrium, what would happen if more reactants were added?
Correct answer: The equilibrium would change in favor of the formation of additional products.
According to LeChatlier's principle, every disruption to an equilibrium system causes the system to adapt itself to offset the effect of the disturbance.
What is the molarity of an aqueous solution containing 0.40 moles of sugar in 5 liters of water?
Correct answer: 0.08 M
Molarity is measured in mol/L units and is defined as moles of solute divided by liters of solution. Simply divide the number of moles by the amount in liters to obtain this answer: 0.40 mol/5 L equals 0.08 M
Which of the following states of matter has a definite volume?
Correct answer: Liquid and solid
A solid has a distinct form as well as volume.
A liquid has a fixed volume but no fixed form.
A gas has neither a fixed volume nor a fixed form.
What is the number of monosaccharides in an oligosaccharide?
Correct answer: Three to six
Monosaccharides are made up of just one sugar unit.
Disaccharides are made up of two monosaccharides.
Oligosaccharides are made up of three to six monosaccharides.
Polysaccharides are made up of at least six monosaccharides.
Which of the following does not represent a state of matter?
Correct answer: Lattice
Matter consists of 3 states: gases, liquids, and solids.
What do you call substances that cannot be broken down into simpler forms of matter?
Correct answer: Elements
An element is a material that cannot be broken down into simpler forms of matter.
An atom having an electrical charge is referred to as a(n):
Correct answer: Ion
An ion is an atom that has an electrical charge.
What is the definition of freezing point?
Correct answer: Point at which a liquid turns to a solid
The freezing point at which a liquid transforms into a solid.
All of the following factors influence the pace of a chemical reaction except:
Correct answer: amount of mass lost
The pace of a chemical reaction is not affected by the quantity of mass lost since the law of conservation of mass (or matter) stipulates that there is no mass loss in a chemical reaction.
Which of the following statements about most metals is false?
Correct answer: They are gases at room temperature
Metals are generally solids at ambient temperature, whereas nonmetals are usually gaseous.
Which of the following elements does not appear on the periodic table?
Correct answer: magnesium oxide
Because it is a combination of two elements, magnesium oxide does not appear on the periodic table.
Lisa prepares soup by combining spices in a saucepan of boiling water and stirring until the spices are completely dissolved. She then adds a variety of diced veggies. What is the solute in her mixture?
Correct answer: spices
A solute is a material that dissolves when it comes into contact with another substance. The spices are the solute in this situation.